Balancing device for pumps.



T. EVANS.

BALANCING DEVICE FOR PUMPS.

APPLICATION FILED APR. 25, 1912.

1,085,556. Patented Jan. 27, 1914.

2 SHEETS-SHEET 1.

T. EVANS.

BALANCING DEVICE FOR PUMPS.

APPLIGATION FILED APR. 25, 1912.

Patented J an. 27, 1914.

2 SHEETS-SHEET 2.

TRUMAN EVANS, OF MANGUM, OKLAHOMA.

BALANCING DEVICE FOR PUMPS.

Specification of Letters Patent.

Patented J an. 27, 1914.

Application filed April 25, 1912. Serial N 0. 693,092.

To all whom it may concern Be it known that I, TRUMAN EVANS, a

citizen of the United States, residing at Mangum, in the county of Greer, State of Oklahoma, have invented certain new and useful Improvements in Balancing Devices for Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in pumps and more particularly to balancing devices for pumps and windmills or the like.

The primary object of the invention is to provide a simple and strong balancing device of novel construction adapted for engagement with a pump or a sucker rod of windmills or pumps thereof, the device being adapted to exert power for assisting in lifting the weight of the column of Water within the pump.

Another and important object of the invention is to provide an improved balancing device which comprises a novel arrangement of weighted levers and connections thereof with the pump rod or sucker rod of the pump, said levers being so supported as to impart increased movement to the pump rod or sucker rod under the action of said weights of the levers and the pump rod -must be depressed by the mill shaft whereas the upward stroke of the pump rod will be assisted by means of my improved equalizer thereby removing a considerable portion of the weight lifted from the mill power.

With the above and other objects in view, the invention consists of certain other combinations and arrangements of parts as will be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the upper portion of a well tube or casing and pump rod having my improved balancing means connected thereto. Fig. 2 is an end elevation of the standard. Fig. 3 is a central vertical sectional view of the device shown in Fig. 1. Fig. 4: is a detail view of one of the weighted levers. Fig. 5 is a cross sectional employed in connection with the form of de vice shown in Figs. 6 and 7.

Referring to the drawings in detail, there s shown my improved balancing device and in Fig. 1, the numeral 10 designates an ordinary well tube or casing which extends vertically and is provided with an outlet 11, the said casing having a pump rod or sucker rod 12 operating therein in the usual manner. This rod 12 is of special construction, being in sectional form and comprising an upper section 13 which is connected with the section 12 by a plurality of pivoted links provided for cushioning the operation of the pump. As shown, the upper end of the section 12 and the lower end of the section 13 each carries a cross head 14, the said cross heads being centrally enlarged and having vertically threaded openings engaged upon the threaded ends of said section and retained against movement by means of jam nuts 15 which contact with the opposite faces of said cross heads when engaged on the threaded ends of the rods, thereby securely holding said cross heads against movement but allowing adjustment thereof for properly regulating the actuation of the balancing mechanism in a manner to be hereinafter made apparent.

The outer ends of the cross heads 14: are formed with apertured enlargements 16, pairs of upper or lower link rods 17 and 18 being connected to said respective end portions 16 for pivotal movement and being likewise pivotally connected to each other as shown at 19, thus providing a joint or connection between the sections of the pump rod or sucker rod for removing the jar and jerky motion from the piston of the pump during its operation and thus serving to considerably prolong the life of the pump or windmill.

In order to operatively connectthe link members 17 and 18 just described and assist the lifting action of the pump, a stand or supporting standard 20 is provided, the same comprising a pair of bar sections having their lower ends formed with enlarged clamping portions 21 which are bent in semicircular form and clamped at their opposite edges to the upper end of the well tube or casing 10 by means of bolts or the like 22 so as to form a rigid support for the balancing device by means of the portions 21 and provided with inwardly extending projections 23 which are horizontally disposed to engage upon the upper end of the well tube or casing for supporting the standards thereupon and said projections are further provided with semicircular recesses 2i coacting to snugly fit around the section 12 of the pump rod or sucker rod for guiding of the latter in its movement therethrough and thus centralizing the movement of the pump rod within the well casing. A pair of levers 25 are provided near their inner ends with a plurality of openings 26 and they are pivotall y and adjustably mounted between the upper ends of the bar sections forming the standard 20 on a pivot bolt 27, the said levers being disposed in cross relation with their innermost ends pivoted to the member 19 connecting the adjacent ends of the link or link rods 17 and 18 so as to impart move ment to said connected ends of the links and consequently to the upper and lower cross heads connected to the pump rod or sections 12 and 13 thereof at a much increased distance relative to the movements of the levers. The apertures or openings 26 permitting the adjustment of the levers whereby the power imparted to the pump rod may be raised, under the action of the adjustable weights 28 which are slidably mounted upon the levers 25 and are provided with set screws 29 for holding said weights in adjusted positions upon the levers near their outer or free ends. The levers 25 also have their inner ends offset as shown at 30 for pivotal connection with the members 19 and 27 and also to produce a better bearing and permit the parts to pass each other during the vertical reciprocating movement imparted to the pump rod without danger of the parts striking each other. It will thus be seen that the normal tendency of the weighted arms 25 is to exert upward pressure at their inner ends where connected to the link or link rods 17 and 18 and thus by reason of the connection of the said links with the sucker rod or pump rod, to raise the latter and thus avoid the necessity of employing the mill power for lifting the weight of the pump rod, by exerting lifting power to raise the weight of the pump rod whereby the down stroke of the pump rod is accomplished by means of the mill shaft or operating beam for the pump so that the mill power is free and is only required to lift the weight of the column of water within the well casing. The action of the pump is therefore considerably cushioned and the balancing means thus provided removes all jar from the operating mechanism, this being especially due to the provision of a sectional sucker or pump rod and the connection of the links forming the same with the weighted levers or arms whereby the power of the latter is not directly but indirectly imparted to the pump rod while such arrangement also increases the relative distance of movement of the sections of the pump rod with regard to the relative swing of the levers, thus rendering the device applicable for use in wells which require the water to be lifted at varying distances.

In Figs. 6 and 7 of the drawings, a slightly modified form of the invention is shown, the parts being identical in construction with the exception of supporting means for the levers 25 and the construction of said levers. In this form of the invention, a substantially U-shaped supporting frame or yoke 31 is provided and has its connecting portion 32 provided with an enlarged and interiorly v threaded sleeve portion 33 which is threaded on the upper end of the well casing 10 and supported in position by means of a jam nut 34; which is also threaded on the casing and engaged against the bottom face of said sleeve portion 33 while the upper ends of the arm of said yoke which are indicated by the numeral 35 are bifurcated as shown at 36 to provide spaced apertured ears between which the levers 25 are pivotally adjustable as shown at 37 The levers are disposed in cross relation in the same manner and have their inner portions formed with a bowed or an offset portion 38, the inner ends 39 being rebent to aline with the main portions of the lever and the adjacent parts of the levers being provided with apertures 40 and 41 for pivotal connection to the upper ends of the arms 35 and the connected ends of the links 17 and 18 respectively as shown at 19. The operation of this form of the invention is essentially the same as that here tofore described except that instead of providing a common pivot for the levers 25 where they are disposed in cross relation, the said levers are provided with independent pivot points whereby the levers are rela tively movable at the points where they cross each other but the connected inner extremities of the levers with the links above referred to move in arcs of circles concentric to the pivots of the levers for producing the increased movement to the sections of the suction rod or pump rod through the connect-ions thereof with the links by means of the cross heads and also for balancing and cushioning the movements of the pump in operation.

From the foregoing disclosure, it will be apparent that a very simple and an improved form of balancing device for pumps or windmills is provided, the load on the mill being increased on the down stroke of the pump,

or sucker. rod while the up stroke of the pump is accomplished with greater facility by proportionately reducing the amount of power required for lifting the pump rod'and column of water within the well casing.

I claim: In a balancing device for pumps, the combination with a pump casing and a support ing member mounted thereon, of a pump rod operating in the casing and comprising a pair of sections, crossheads carried by the adjacent ends of said sections, a pair of spaced links pivotally mounted on each of said crossheads, the free ends of one pair of links being pivotally connected to the adj acent free ends of the second pair of links and a pair of levers adjustably and pivot ally connected to the support and pivotally 10 connected to the links Where said links are connected to each other. a

In testimony whereof, I aflix my signature, in presence of tWo Witnesses.

TRUMAN EVANS. Witnesses J AS. A. MGKIBBIN, R. A. SMITH.

copiel 01' this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

Washington, D. 0. 

